[].concat(1,2) // 输出[1,2] [].concat(1,2,[3,4]) //输出[1,2,3,4] 真正的官网上给出的解释是: When the concat method is called with zero or more arguments item1, item2, etc., it returns an array containing the array elements of the object followed by the array elements of...
In Javascript, array is a list of elements may it be string, numbers, Boolean, etc. Concatenation is adding two arrays or more than 2 arrays. Similar to add, array1+ array2, concat() method works similarly in javascript. It appends the array elements at the end of the array to which ...
[ 'C', 'C++', 'Lua', 'JavaScript', 'Python', 'Java' ] Example 2: Concatenating nested arrays Theconcat()method returns the shallow copy of the concatenated elements in the following way: It copies object references to the new array. (For example: passing a nested array) So if the r...
/* Array.reverse() (Method) Reverse the order of array elements. Property/method value type: Array object */ document.write("arr.reverse() is " + arr.reverse() + ""); /*Array.sort() (Method) Sort the elements in an array. Property/method value type: Array object JavaScript syntax:...
concat方法不会更改原始数组，您需要重新分配它。
The concat() method is used to join two or more arrays. Concat does not alter the original arrays, it returns a copy of the same elements combined from the original arrays.VersionImplemented in JavaScript 1.2 Syntaxconcat(arrayname1, arrayname2, ..., arraynameN) ...
concat方法不会更改原始数组，您需要重新分配它。
The JavaScript concat() method works in following ways. 1. The concat() method creates new array concatenating the array on which it is called and passed elements or arrays as arguments. 2. The concat() method does not alter the array on which it is called and the arrays passed as argum...
In JavaScript, the push() function returns the array's length after adding the new elements. For example: var example=[1,2,3,4]; //declaring the array example.push(6); //adding element to the array You can also try this code withOnline Javascript Compiler Run Code Here the...
Array Tutorials: Array Tutorial Array Const Basic Array Methods Array Search Methods Array Sort Methods Array Iteration Methods Browser Support concat()is an ECMAScript1 (JavaScript 1997) feature. It is supported in all browsers: ChromeEdgeFirefoxSafariOperaIE ...